Rice and wheat thresher

The utility model provides a rice and wheat thresher. It includes a machine frame, a seed-husking warehouse positioned at the machine frame, a beater positioned in the seed-husking warehouse and driven by the power source and mounted at the machine frame, a weeding screw conveyor driven by the beater via a driving device (5), a seed-husking comb shaped rack positioned on the machine frame and matched with the beater, and a sieve positioned at the bottom of the seed-husking warehouse and mounted at the machine frame. The device is characterized in that: the device also includes a bin positioned at the bottom of the sieve and mounted at the machine frame, and a feeding screw conveyor driven by the beater via a driving device (11) and positioned in the bin; a centrifugal suction blower is communicated with the discharge port of the bin; an air-duct of the centrifugal suction blower is equipped with and connected with a centrifugal granular cleaning barrel including a lower rice and wheat exit and an upper rank grass and dust exit. The advantages are once thorough threshing and labor saving.